This articlerelies largely or entirely on asingle source. Relevant discussion may be found on thetalk page. Please helpimprove this article byintroducing citations to additional sources. Find sources: "Beale number" – news ·newspapers ·books ·scholar ·JSTOR(June 2024)

Inmechanical engineering, theBeale number is a parameter that characterizes the performance ofStirling engines.^[1] It is often used to estimate the power output of a Stirling engine design. For engines operating with a high temperature differential, typical values for the Beale number are in the range 0.11−0.15; where a larger number indicates higher performance.

The Beale number can be defined in terms of a Stirling engine's operating parameters:

${\displaystyle B_n=\frac{Wo}{PVF}}$

where:

• B_n is the Beale number
• Wo is the power output of the engine (watts)
• P is themean average gaspressure (Pa) or (MPa, if volume is incm³)
• V is sweptvolume of the power piston (m³, orcm³, if pressure is inMPa)
• F is the engine cycle frequency (Hz)

To estimate the power output of an engine, nominal values are assumed for the Beale number, pressure, swept volume and frequency, then the power is calculated as the product of these parameters, as follows:

${\displaystyle Wo=B_{n}PVF}$

• West number

• Stirling Engine Performance Calculator
• Beale number calculator

Thisthermodynamics-related article is astub. You can help Wikipedia byexpanding it.

• v
• t
• e

This article about a mechanical engineering topic is astub. You can help Wikipedia byexpanding it.

• v
• t
• e

• Dimensionless numbers of thermodynamics
• Piston engines
• Mechanical engineering
• Thermodynamics stubs
• Mechanical engineering stubs

• CS1: long volume value
• Articles needing additional references from June 2024
• All articles needing additional references
• All stub articles